Consider that 168.0 j of work is done on a system and 305.6 j of heat is extracted from the system. in the sense of the first law of thermodynamics, what is the value (including algebraic sign) of w, the work done by the system?
i think that it's radiating electro magnetic radiation
some bombs actually use electromagnetic radiation in a emp (electromagnetic pulse) to disable electronics and antennas.
the gravity on the moon is different than on earth.
we only need to look at newton's 2nd law of motion:
net force = (mass) x (acceleration)
if the net force on an object is zero, then either its mass or its acceleration must be zero. if it's called an "object", then its mass isn't zero, so its acceleration is zero.